DNA Ch 12.1.

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Presentation transcript:

DNA Ch 12.1

Find the following answers: What is this chapter about? Name the 2 nucleic acids in chapter 12. How is DNA different from RNA? What are the 4 bases in DNA? What are the 4 bases in RNA? How are the bases different? How many types of RNA are there? Name them. What is the full name for DNA? RNA? Give a definition for Duplication = Replication Which nucleic acid can duplicate? Describe what you see in Protein Systhesis

1) Recognize the structure of DNA a) I will write what DNA stands for b) I will describe what “double helix” means c) I will list the parts of the sides of the DNA molecule d) I will list the nitrogen bases in DNA Say what they are attached to on the sides Pair them correctly

What is the name of DNA? Deoxyribo-Nucleic Acid

DNA Structure: Double Helix or Twisted Ladder Rungs of ladder Nitrogen bases attach to the sugars: ADENINE THYMINE GUANINE CYTOSINE Sides of ladder Phosphate Sugar Building block Phosphate, sugar & nitrogen base Called a NUCLEOTIDE

What are the building blocks of DNA? What is a nucleotide made of? Nucleotides Phosphate Sugar Nitrogen base Rungs of the ladder Sides of the ladder

What is Base Pairing? When bases match specifically: Adenine Thymine Guanine Cytosine

Is there anything special about the DNA Sugar? It is missing an oxygen - De oxy DNA RNA

Who discovered DNA? Watson & Crick, 1952 They called it a Double Helix 2 strands are wound around each other They made 3-D models with wire and wood. Based on the photographs of Rosiland Franklin

Hydrogen bonds hold the bases together 2 between A and T 3 between G and C

TODAY TAKE OUT SHEET OF PAPER. # 1-10 USE A PEN ONLY

Think-Write-Pair-Share List 10 facts learned about DNA: The name is Deoxyribo-Nucleic Acid The shape is a double helix or twisted ladder The building block is called a nucleotide Nucleotides are made of: Phosphate Sugar Nitrogen base Double helix sides are phosphate and sugar Double helix rungs are nitrogen bases Adenine matches with Thymine Guanine matches with Cytosine DNA’s sugar is missing an oxygen DNA was discovered by Watson & Crick The bases are held together by hydrogen bonds

Describe Watson and Crick’s model of the DNA molecule. What are the 4 kinds of bases in DNA? 3. Describe the components and structure of a DNA nucleotide. 4. What is meant by the term base pairing?

HOT Questions Match the following to their partners: Adenine - Guanine - Describe the shape of a DNA molecule Illustrate the structure of a nucleotide Make a diagram of a DNA molecule and label the sides and rungs of the “ladder” Show the number of hydrogen bonds between the nitrogen bases Support with example (picture) how the DNA sugar is different from the sugar in RNA.

1 Lab Report for 2 people Title Purpose Hypothesis Materials Procedure Observation Conclusion Questions What is the shape of DNA? Name the 4 bases and how they are paired. What are the sides of the DNA molecule made of? What are the rungs of the DNA ladder made of? What holds the bases together?